October is the month of the Rosary. Annually, this month is dedicated to the Most Holy Rosary, primarily due to the fact that on October 7th we celebrate the Feast of Our Lady of the Rosary.
On this day in 1571, a Christian military coalition led by Spain defeated the Turkish Muslim forces in Lepanto, Greece. The Christians won due to the intercession of the Virgin Mary and the massive prayer of the Holy Rosary. The miraculous help of the Mary avoided Western Hemisphere to fall under the violent Islamic Ottoman Empire.
As an offering of thanksgiving, Pope St. Pius V declared this day as the feast day of Our Lady of Victory, later known as Our Lady of the Rosary.
How to Pray the Rosary